This Sanke to Ball Lock Conversion Gas Post will allow you to easily switch between your Ball Lock Cornelius Keg and commercial Sanke kegs. Sanke Couplers have 3/16" and 5/16" barb fittings attached, remove the 5/16" and attach this Conversion Gas Post. Then repeat the process with the Conversion Liquid Post (sold separately) and you are ready to dispense your beer and enjoy!